The Suja Rock 'n' Roll San Diego half marathon has wiled Keflezighi into leading the1 hour, 30 minute pace group on June 1. Think of it as adult daycare: If he can run the Boston Marathon averaging 4:54 per mile, he can jog you through a half at 6:52s and still crack a joke or two.

But if it comes down to a race, just don't let Meb get away too early.